AMD Ryzen 9 8945HX vs AMD Ryzen AI 7 450G Comparison

Where Each One Wins

The benchmark split is decisive: the AMD Ryzen 9 8945HX wins 9 of the 11 recorded head-to-head tests, while the AMD Ryzen AI 7 450G wins 2. The Ryzen 9 8945HX dominates every multithreaded workload in the database, with margins ranging from 50.6% to 201.1%. The Ryzen AI 7 450G takes exactly two tests, both single-thread measurements, and those are the same test recorded under two names (passmark_single_thread and passmark_singlethread), so in practice it holds one unique victory.

The Ryzen 9 8945HX is the clear choice for heavily parallel workloads. Its largest win comes in passmark_find_prime_numbers, where it scores 262 versus 87, a 201.1% advantage. Integer math, floating point math, data compression, and random string sorting all show the same pattern: the 16-core part outruns the 8-core part by between 68.2% and 95.7%. These are workloads that scale with core count and cache capacity, and the data confirms the Ryzen 9 8945HX has both in far greater measure.

The Ryzen AI 7 450G wins the single-thread contest with a score of 4309 versus 3907, a 9.3% margin. That is a meaningful edge for lightly threaded applications, but it is the only category where the smaller chip leads. Its average benchmark score of 63331 places it in the 93rd percentile of all CPUs, while the Ryzen 9 8945HX sits in the 95th percentile with an average score of 76212. The overall performance tier is close, but the distribution of strengths is not.

For users running rendering, compilation, scientific simulation, or any workload that saturates all threads, the Ryzen 9 8945HX is the superior part in every measured metric. For users whose primary applications are single-threaded, the Ryzen AI 7 450G offers a measurable advantage, but that advantage applies to a narrow slice of the benchmark suite.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 9 8945HX has an average benchmark score of 76212, compared to 63331 for the AMD Ryzen AI 7 450G. The Ryzen 9 8945HX also holds a higher percentile ranking at 95 versus 93 for the Ryzen AI 7 450G.

Q: How much faster is the Ryzen 9 8945HX in multithreaded tests?

A: The Ryzen 9 8945HX scores 51405 in passmark_multithread versus 30422 for the Ryzen AI 7 450G, a 69% advantage. In data compression the margin is 68.2% (677755 versus 402831), and in integer math it is 95.7% (195180 versus 99732).

Q: Does the Ryzen AI 7 450G win any benchmark?

A: Yes, it wins both single-thread tests. It scores 4309 in passmark_single_thread and passmark_singlethread, while the Ryzen 9 8945HX scores 3907 in both. That is a 9.3% advantage for the Ryzen AI 7 450G.

Q: What are the core and thread counts for each processor?

A: The AMD Ryzen 9 8945HX has 16 cores and 32 threads. The AMD Ryzen AI 7 450G has 8 cores and 16 threads.

Q: Which processor has more L3 cache?

A: The Ryzen 9 8945HX has 64 MB of L3 cache. The Ryzen AI 7 450G has 8 MB of L3 cache.

Q: How do the two processors compare in data encryption?

A: The Ryzen 9 8945HX scores 40836 in passmark_data_encryption versus 18937 for the Ryzen AI 7 450G, a 115.6% advantage. This is the second-largest margin in the entire head-to-head comparison.

Head-to-Head Benchmarks

The largest single win for the Ryzen 9 8945HX is in passmark_find_prime_numbers, where it scores 262 against 87 for the Ryzen AI 7 450G. This 201.1% margin is more than double the second-largest gap, which is data encryption at 115.6% (40836 versus 18937). Prime number finding is a workload that stresses integer arithmetic and cache hierarchy, and the Ryzen 9 8945HX's 16 cores, 64 MB L3 cache, and higher base clock of 2.50 GHz versus 2.00 GHz all contribute to the result.

Integer math shows the second-biggest percentage gap among the major workloads. The Ryzen 9 8945HX scores 195180, while the Ryzen AI 7 450G scores 99732, a 95.7% advantage. Floating point math follows at 84.4% (117453 versus 63683), and random string sorting is close behind at 84.7% (78781 versus 42663). These three tests all involve heavy data movement and computation across many threads, and the Ryzen 9 8945HX's 32 threads versus 16 threads explains the consistent doubling of performance.

Data compression shows a 68.2% advantage (677755 versus 402831), while multithread performance is 69% higher (51405 versus 30422). Extended instructions score 76.5% higher (49823 versus 28223). Physics simulation shows the smallest margin among the Ryzen 9 wins at 50.6% (2168 versus 1440), which still represents a substantial lead.

The single-thread results flip the outcome. The Ryzen AI 7 450G scores 4309 in both passmark_single_thread and passmark_singlethread, against 3907 for the Ryzen 9 8945HX. That 9.3% gap is the only case where the Ryzen AI 7 450G leads. Notably, the Ryzen AI 7 450G achieves this with a lower boost clock of 5.10 GHz versus 5.40 GHz, suggesting the Zen 5 architecture in the Ryzen AI 7 450G delivers higher instructions per clock than the Zen 4 architecture in the Ryzen 9 8945HX.

Specification Differences

The two processors differ in nearly every major specification category. The Ryzen 9 8945HX has 16 cores and 32 threads, while the Ryzen AI 7 450G has 8 cores and 16 threads. Base clocks are 2.50 GHz versus 2.00 GHz, and boost clocks are 5.40 GHz versus 5.10 GHz, both favoring the Ryzen 9 8945HX.

Power envelopes differ in an interesting direction: the Ryzen 9 8945HX has a TDP of 55 watts, while the Ryzen AI 7 450G has a TDP of 65 watts. Despite the higher power limit, the Ryzen AI 7 450G still loses every multithreaded test, which highlights the core-count disparity.

The sockets are different. The Ryzen 9 8945HX uses AMD Socket FL1, while the Ryzen AI 7 450G uses AMD Socket AM5. The market segments also differ: the Ryzen 9 8945HX is a mobile processor, while the Ryzen AI 7 450G is a desktop processor.

Memory support diverges. The Ryzen 9 8945HX supports DDR5 only, while the Ryzen AI 7 450G supports both DDR5 and LPDDR5X. Memory bandwidth favors the Ryzen AI 7 450G at 89.6 GB/s versus 83.2 GB/s for the Ryzen 9 8945HX. The Ryzen AI 7 450G also supports ECC memory, while the Ryzen 9 8945HX does not.

PCIe connectivity differs substantially. The Ryzen 9 8945HX provides Gen 5 with 28 lanes (CPU only), while the Ryzen AI 7 450G provides Gen 4 with 12 lanes (CPU only). The integrated graphics are also different: Radeon 610M on the Ryzen 9 8945HX versus Radeon 860M on the Ryzen AI 7 450G.

Process nodes differ. The Ryzen 9 8945HX uses a 5 nm process from TSMC with a die size of 2x 71 mm² and 13,140 million transistors. The Ryzen AI 7 450G uses a 4 nm process from TSMC with a die size of 195 mm². The transistor count for the Ryzen AI 7 450G is not recorded.

Release dates are far apart. The Ryzen 9 8945HX launched on 2025-04-22, while the Ryzen AI 7 450G launched on 2026-02-28. Both processors are actively produced, and both have unlocked multipliers.

Architecture Differences

The Ryzen 9 8945HX belongs to the 8000 series and uses the Zen 4 architecture under the Dragon Range codename. Its generation is listed as Ryzen 9 (Zen 4 (Dragon Range)). The Ryzen AI 7 450G belongs to the Ryzen AI 400 generation and uses a hybrid configuration of Zen 5 and Zen 5c cores under the Gorgon Point codename. This architectural generation gap explains the single-thread advantage of the Ryzen AI 7 450G despite its lower boost clock.

Cache hierarchies differ dramatically. The Ryzen 9 8945HX has 64 KB of L1 cache per core, 1 MB of L2 cache per core, and 64 MB of L3 cache. The Ryzen AI 7 450G has 80 KB of L1 cache per core, 1 MB of L2 cache per core, but only 8 MB of L3 cache. The L3 cache difference is the most striking architectural gap: 64 MB versus 8 MB is an 8x disparity.

The process node improvement is modest but present: 5 nm for the Ryzen 9 8945HX versus 4 nm for the Ryzen AI 7 450G, both from TSMC. The die size for the Ryzen AI 7 450G is 195 mm², which is larger than either of the two 71 mm² dies on the Ryzen 9 8945HX, reflecting the integrated graphics and memory controller layout for the desktop socket.

The Ryzen AI 7 450G supports LPDDR5X memory, which the Ryzen 9 8945HX does not. It also supports ECC memory. These features, combined with the desktop AM5 socket, position the Ryzen AI 7 450G for workstation or always-on systems where memory integrity matters. The Ryzen 9 8945HX's PCIe Gen 5 with 28 lanes, by contrast, supports more expansion bandwidth for mobile workstation use cases.

The integrated GPU differs as well: Radeon 610M on the Ryzen 9 8945HX versus Radeon 860M on the Ryzen AI 7 450G. While the benchmark database does not include graphics tests, the GPU naming suggests the Ryzen AI 7 450G carries a higher-tier integrated graphics solution.

The Verdict

The benchmark data points to a clear split: the AMD Ryzen 9 8945HX is the processor for multithreaded throughput, and the AMD Ryzen AI 7 450G is the processor for single-thread responsiveness. The Ryzen 9 8945HX wins 9 of 11 head-to-head tests, including every workload that exercises multiple cores. Its margins are not narrow: the smallest victory is 50.6% in physics, and the largest is 201.1% in prime number finding. The average benchmark score of 76212 versus 63331 places the Ryzen 9 8945HX in the 95th percentile of all CPUs, against the 93rd percentile for the Ryzen AI 7 450G.

The Ryzen AI 7 450G's single-thread win of 9.3% is real and consistent across both recorded single-thread tests. That advantage comes from the newer Zen 5 / Zen 5c architecture, which delivers higher instructions per clock than Zen 4 in the Ryzen 9 8945HX. For applications that run mostly on one or two threads, the Ryzen AI 7 450G will feel faster despite its lower boost clock of 5.10 GHz versus 5.40 GHz.

The Ryzen 9 8945HX also offers a larger L3 cache (64 MB versus 8 MB), more PCIe lanes (28 Gen 5 lanes versus 12 Gen 4 lanes), and a lower TDP (55 watts versus 65 watts). These specifications reinforce its position for heavy parallel workloads, while the Ryzen AI 7 450G counters with ECC memory support, LPDDR5X compatibility, and higher memory bandwidth (89.6 GB/s versus 83.2 GB/s).

Given the data, the Ryzen 9 8945HX is the stronger choice for rendering, scientific computing, code compilation, and any workload that can utilize 32 threads. The Ryzen AI 7 450G is the better option for single-threaded desktop applications, memory-sensitive tasks with ECC requirements, and systems that need the smaller footprint of an 8-core, 16-thread part. The average benchmark scores confirm the overall hierarchy: the Ryzen 9 8945HX sits 20.4% above the Ryzen AI 7 450G in aggregate performance, and the head-to-head results show no multithreaded category where the smaller chip can close the gap.